Automatic brake for phonographs.



w. E. HOSCHKE. AUTOMATIC BRAKE FOR PHUNOGRAPHS.

APPLICATION FILED APR- 6. 19H.

Lm Patented July 27, 1915.

YVlLLAM. E.'HOSCHKE, OF NEW YORK, N. Y., ASS'IAGLNOR, BY MESNE ASSIGNMENTS, TO SUNGRA. PHONOGRAPH CGRPORATION, A. COEPBATION'OF NEW YRK.

.AUTQIVLJIIC BRAKE FOR PHONOGRAPHS.

Specification of Letters Patent.

Patented July 2'?, MM5.

Application filed pril 6, 1911. Serial No. 619,287.

To all whom it may concern: i

le it known that l, VVILLTAM E. Hosorrnn, a citizen of the United States, residing in New York, borough oi Brooklym in the State oit' New York, have invented certain new and useful lmprovements in Automatic Brakes for phonographs, of which the following is a specification.

rlhis invention relates to that part of a monograph which concerns the stopping of "he record when the stylus has arrived at the end of the sound-producing groove.

The object of this invention is to provide means which will stop the Imovement of the record when the piece has been completed, which means are set in operation at the completion of the piece by means which move proportionately to the number of ro- .tations of the record.

More particularly the invention consists of mechanism, one member of which is adapted to be placed at a point removed from the record-stopping means or brake, a. distance proportionate to the number or' turn to be made of the record, so that by setting this member at suoli point at the beginning of the piece to be performed, the member will, simultaneously with the completion of the'piece, arrive at and actuate the brake,\ whereby the rotation 'of the record is automatically stopped, obviating thereby 'the necessity of a person specially going to the phonograph and manually operating the braking means.

1n the accompanying drawing,V

Figure 1 is a top-view of a phonograph embodying my invention, with parts broken away, Fig. 2 is a vertical section on line 2-2, Fig. 1, Fig. 3Vis a vertical section on line 3-3, Fig. 1, and Fig. 4 is a top-view of thephonograph on a' reduced scale.

Similar letters. of reference indicate corresponding parts. v

ln .the drawing, 10 indicates the top-plate ofthe phonograph ,'case, which is provided with an opening 11. Through said opening extends a vertical drive-shaft 12, to the upper end of which is secured, the recordcarrying disk 13, adapted to support the4 record 14. At its lower portion the driveshaft is connected to any suitable motor (not shown), for -diivino the same.

. Ont-he shaft 12 is tixed a pinion l5, engaging a gear 16 mounted to rotate onvertical stud 17 of a su" ortin -rarae 13 y PP E within the phonograph-casing. To said gear is secured, on the same axis, a pinion 19, engaging a gear 20 mounted on'a vertical stud 21 of the frame 18. Said lastmentioned gear-wheel 2O carries an upwardly-projecting pin 22, adapted when the gear 20 is rotated, to engage successively the teeth of a ratchet-wheel 23 xed to. an arbor 24 mounted at one end in the frame 18 and at the other end in a bracket 25 'of the same. Said arbor carries a pinion 26, engaging a gear-wheel V27 supported at its hub on a bracket 28 of the frame 18, and loosely mounted to rotate on a sleeve 29 of said bracket, said sleeve surrounding the shaft 12 and providing a vertical bearing for the same above the supporting-frame 18.

To the gear-wheel 27 is ixed an outwardly-extending tripping pointer which is provided beyond the disk with a point adapted to move over a curved scale 3l secured on the top 10 of the case, and on the completion of its movement, at one end of the scale, to trip the braking means. The brake comprises an angular brake-lever 32 pivoted on the top 10 and carrying at one end a brake-shoe 33 adapted to engage the edge of the. record-carrying disk 13, and

having at its other end a handle 34, where- I pivoted oli its center to a suitable supporting-bracket 36 of the top 10. During rotation of the disk one leg 40 of' the U- shaped trigger engages the brake-lever and thereby retains the'brake-shoe away from the disk, while the other leg 41 is located in the path of the tripping-arm 30. When the arm 30 strikes the leg 41, the trigger is moved and the leg 40 is lifted away from the brake-lever, in the position shown in dotted lines in Fig. 3, thereby releasing the same andpermitting thebrake-spring 35 to operate the brake, thus pressing the brakeshoe against the edge of the disk and bringing the same to rest, as indicated in Fig. 4. A stop-pin 44 limits the return movement of the brake, when restoring the same to inoperative position.

Each record is provided with a number, as for instance, the number 350 (Fig. 4 indicating the number on the scale to whic the tripping-pointer is to be set prior to commencing the operation of the phonograph with the respective record.

The tripping pointer having been by hand moved to the number on the scale corresponding to the indicated number on the record, and the stylus 50 having been set at the beginning of the groove, the brake is Withdrawn by hand and the rotation of the disk commences.

At each revolution of the pin 22 it engages the ratchet 23 and moves the same forward one tooth, thereby rotating the arbor 24, pinion 26 and gear-wheel 21, and imparting to the pointer l30 a step-by-step movement along the arc-shaped scale toward the brake. When the pointer arrives at the brake, it releases the same in the manner before described, whereby the disk is automatically brought to rest at the completion of theperformed composition.

' When the pointer is in its final position of rest against the brake-lever, as just described, the pin 22 may be in engagement with the ratchet, and it would then be impossible to again move the pointer by hand to a desired point on the scale, as the engagement of the pin with the ratchet teeth would prevent such movement. To overcome this difficulty, the pinion 26, instead of being ixed to the arbor 24, is loose upon the same, but is held by a spring 51 on the arbor in frictional contact with a collar fixed to the arbor, whereby when the pointer is moved for settingthe same, the pinion is by the gear 27 turned on the arbor against its frictional engagement with the collar, without rota-ting the arbor and ratchet wheel, which are held against rotation by the pin 22. Or, for releasing the pointer so that' it may be moved freely over the scale, the brake may be held by the operator away from the disk for a few turns of the latter, until the pin 22 is out of engagement with the ratchet, thereby permitting free rotation of the ratchet and its arbor and pinion and the free movement of the pointer over the scale for setting the same for a record.

One embodiment of the invention has been described, but itis obvious that changes maybe made in the construction without departing from the spirit of the invention,

which consists, as before stated, in the trip ping-pointer and its scale and the bra te actuated by the pointer, whereby the number of turns to be made is capable of being controlled at the beginning of the operation, according te the length of the record to be played.

Having thus described my invention, claim as new and desire to secure by Letters Pat-ent:

l. The combination of a driving shaft, a rotary element, a stationary arc-shaped `graduated scale. an automatic brake having a trip disposed adjacent to said scale, said brake being adapted to stop the rotation of said driving shaft when said trip is released, a pointer arm adapted to move over said scale and engage said tri to release it, and intermediate mechanism between said arm and driving shaft for imparting an intermittent step by step motion to said arm.

The combination of a rotary element, a stationary graduated scale, an automatic brake for said rotary element having a trip, a pointer arm adapted to move in relation to said scale and engagey said trip to release it, and intermediate mechanism between said arm and rotary element for imparting an intermittent step by step motion to said arm.

The combination of a rotary element, a stationary arc-shaped graduated scale, an automatic brake for said rotary element comprising a spring actuated brake lever adapted to engage said rotary element and a U-shaped trigger pivoted oil its center and having one leg thereof adapted to engage said brake lever, a tripping pointer arm adapted to move, over said scale and engage the other leg of said trigger to permit the operation of the brake, and intermediate mechanism between said arm and rotary elcment for imparting an intermittent step by stepmotion to said arm.

1n testimony, that l claim the foregoing as my invention, I have signed my name in presence of two subscribing witnesses.

WILLIAM E. llOSU-Hlil). Witnesses:

Joux Minimum, L. M. Dolman'.

Copies of this patent may be obtained for ve cents each, by adressng the Commissioner et vatents. Washington, D. C. 

